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原文链接地址:『高级篇』docker之课程管理dubbo入门操练(14)
接下来我们即将开始说课程管理,课程服务他是基于dubbo实现的,所以先来预热下,dubbo,对不熟悉的dubbo的老铁进行一下讲解。 源码:https://github.com/limingios/dubbo.git
dubbo 介绍
高性能的基于java的,RPC框架。dubbo是阿里巴巴开源的一个项目,就像大多的RPC框架,dubbo的思想围绕一个服务,指定一个方法的参数和返回值,这个方法可以被远程调用的,在服务端,会实现这个接口,会运行dubbo的服务用来处理客户端的调用,在客户端,会有一个存根它提供和服务端想通的方法。其实这些概念用java的术语:首先要定义一个接口,这个接口在服务端和客户端公用,服务端会完成这个接口的实现,客户端通过接口的描述来调用服务端。
快速入门讲解 spring 版本,
根据官网来创建
创建三个api,provider,consumer 三个项目
用了本地调用。
provider.xml
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://dubbo.apache.org/schema/dubbo" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd http://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd"> <!-- 提供方应用信息,用于计算依赖关系 --> <dubbo:application name="demo-provider" /> <!-- 使用multicast广播注册中心暴露服务地址 --> <dubbo:registry register="false" /> <!-- 用dubbo协议在20880端口暴露服务 --> <dubbo:protocol name="dubbo" port="20880" /> <!-- 声明需要暴露的服务接口 --> <dubbo:service interface="com.alibaba.dubbo.demo.DemoService" ref="demoService" /> <!-- 和本地bean一样实现服务 --> <bean id="demoService" class="com.alibaba.dubbo.demo.provider.DemoServiceImpl" /></beans>
consumer.xml
<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <parent> <artifactId>dubbo-demo</artifactId> <groupId>com.idig8</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>dubbo-demo-consumer</artifactId> <dependencies> <dependency> <groupId>com.idig8</groupId> <artifactId>dubbo-demo-api</artifactId> <version>1.0-SNAPSHOT</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.6.4</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.3.0.RELEASE</version> </dependency> </dependencies></project>
快速入门讲解springboot版本
SpringBoot整合dubbo示例
一、定义API(API模块)
1. 定义api
package com.idig8.springboot.dubbo.demo;public interface DemoService { String sayHello(String name); }
2. install到本地
对外提供的maven坐标如下:
<dependency> <groupId>com.idig8</groupId> <artifactId>dubbo-demo-api</artifactId> <version>1.0-SNAPSHOT</version></dependency>
二、服务提供者(provider模块)
1. 增加maven依赖
<!-- springboot parent --><parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.3.RELEASE</version></parent><!-- springboot dubbo starter --><dependency> <groupId>io.dubbo.springboot</groupId> <artifactId>spring-boot-starter-dubbo</artifactId> <version>1.0.0</version></dependency><!-- api dependence --><dependency> <groupId>com.idig8</groupId> <artifactId>dubbo-demo-api</artifactId> <version>1.0-SNAPSHOT</version></dependency>
2. 实现API接口
package com.idig8.springboot.dubbo.demo.provider;import com.alibaba.dubbo.config.annotation.Service;import com.idig8.springboot.dubbo.demo.DemoService;@Servicepublic class DemoServiceImpl implements DemoService { public String sayHello(String name) { return "Hello, " + name + " (from Spring Boot)"; } }
3. springboot配置文件 - application.properties
spring.dubbo.application.name=demo-provider#这里使用广播的注册方式,#如果有Can't assign address异常需要加vm参数:#-Djava.net.preferIPv4Stack=truespring.dubbo.registry.address=multicast://224.5.6.7:1234 spring.dubbo.protocol.name=dubbo spring.dubbo.protocol.port=20880 spring.dubbo.scan=com.idig8.springboot.dubbo.demo.provider
4. 启动类
package com.idig8.springboot.dubbo.demo.provider;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplicationpublic class MainProvider { public static void main(String[] args) { SpringApplication.run(MainProvider.class,args); } }
三、服务消费者(consumer模块)
1. 增加maven依赖
<!-- springboot parent --><parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.3.RELEASE</version></parent><!-- springboot web starter --><dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId></dependency><!-- springboot dubbo starter --><dependency> <groupId>io.dubbo.springboot</groupId> <artifactId>spring-boot-starter-dubbo</artifactId> <version>1.0.0</version></dependency><!-- api dependency --><dependency> <groupId>com.idig8</groupId> <artifactId>dubbo-demo-api</artifactId> <version>1.0-SNAPSHOT</version></dependency>
2. 实现controller
package com.idig8.springboot.dubbo.demo.consumer;import com.alibaba.dubbo.config.annotation.Reference;import com.idig8.springboot.dubbo.demo.DemoService;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RestController;@RestControllerpublic class DemoConsumerController { @Reference private DemoService demoService; @RequestMapping("/sayHello") public String sayHello(@RequestParam String name) { return demoService.sayHello(name); } }
3. springboot配置文件 - application.properties
server.port=8080#dubbo configspring.dubbo.application.name=demo-consumer#这里使用广播的注册方式,#如果有Can't assign address异常需要加vm参数:#-Djava.net.preferIPv4Stack=truespring.dubbo.registry.address=multicast://224.5.6.7:1234 spring.dubbo.scan=com.idig8.springboot.dubbo.demo.consumer
4. 启动类
package com.idig8.springboot.dubbo.demo.consumer;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplicationpublic class Main { public static void main(String[] args) { SpringApplication.run(Main.class,args); } }
PS:dubbo的入门也就到这里,从spring 和springboot 对dubbo的整合。
流程基本之前也说,api 建立接口,provider 实现接口, consumer 调用接口。
作者:IT人故事会
链接:https://www.jianshu.com/p/4eb555df4b76
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